Greetings all, I have 2 quantum boards (260 watt) running in a 4x4 tent (1.20x1.20x200cm) and I'm struggling to get the right height. Also, 1 of the QB's has a dimmer, the other 1 not. What would be the best height for early veg? Tried different heights, but I still seem to burn the young plants, even at a distance of 3 feet. Or should I start with just 1 QB in early seedling/veg stage? Any input would be much appreciated, especially from other growers who're actually using QB's.